The Cloud Egress Trap: A 2026 Case Study in Infrastructure Cost Optimization
In 2026, cloud egress costs remain one of the most underestimated line items in SaaS infrastructure budgets. This case study walks through how a hypothetical B2B SaaS company with 20TB/month egress can reduce its annual infrastructure bill by over $65,000 without compromising reliability or performance.
The TCO Formula
Bare-Metal TCO = (vCPU × $6.50 + RAM × $1.10) × HA_Mult + Storage × $0.015 + max(0, Egress_TB − 20) × 1024 × $0.001
The critical inflection point: egress at scale. On AWS, 100TB of outbound data costs $8,330/month in egress alone. On Hetzner with 20TB free included per server, the same workload costs approximately $80 in overage.
2026 Reference: 3-Scenario Comparison
| Scenario | vCPU/RAM | Egress/mo | Hyperscaler/mo | Bare-Metal/mo | Annual Savings |
|---|---|---|---|---|---|
| Early-Stage Startup | 8 vCPU / 32GB | 2 TB | $560 | $95 | $5,580 |
| Growth SaaS (Mid) | 16 vCPU / 64GB | 20 TB | $2,330 | $340 | $23,880 |
| Scale-Up Platform | 32 vCPU / 128GB | 100 TB | $11,850 | $890 | $131,520 |
Frequently Asked Questions
What is cloud egress and why is it so expensive?
Cloud egress is data transferred OUT of a cloud provider's network to the public internet or another provider. AWS, Azure, and GCP charge $0.085–$0.09/GB for outbound data after a small free tier (100GB on AWS). This is not a bandwidth cost — it's a lock-in mechanism. A startup transferring 100TB/month pays ~$8,500 in egress fees alone on AWS, while the same workload on Hetzner or OVH incurs near-zero egress costs with 20TB+ included free per server.
What is a good monthly cloud TCO for a mid-size SaaS startup in 2026?
A typical B2B SaaS startup serving 10,000 MAU with 16 vCPU, 64GB RAM, and 10TB monthly egress would see: Hyperscaler TCO of $2,800–$4,200/month vs. $450–$700/month on optimized bare-metal + zero-egress CDN. The 5–8x multiplier compounds over time — a $50K/year AWS bill can often be reduced to $8–12K without sacrificing reliability, using Hetzner for compute and Cloudflare for CDN/egress.
What does HA (High Availability) cost in cloud vs. bare-metal?
In hyperscalers, HA typically means running resources in 2+ Availability Zones, effectively doubling compute costs plus cross-AZ data transfer fees ($0.01/GB). On bare-metal providers like Hetzner, a second identical server costs the same marginal rate — no cross-AZ transfer tax. For the same 16 vCPU + 64GB RAM HA setup: AWS ~$3,900/month vs. Hetzner ~$280/month. The savings fund significant engineering capacity.
When should I stay on a hyperscaler instead of migrating?
Hyperscalers excel when you need: (1) ML/AI training with GPU spot instances, (2) Managed services with no equivalent (SageMaker, BigQuery, Cognitive Services), (3) Compliance certifications pre-validated (FedRAMP, HIPAA BAAs), (4) Single-region to multi-region burst capacity, or (5) Sub-millisecond latency to other AWS services in your architecture. For pure compute + storage + egress workloads, bare-metal is almost always cheaper.
What is a zero-egress CDN and how does it eliminate costs?
Zero-egress CDNs (Cloudflare, Bunny CDN, Fastly) charge flat monthly fees for bandwidth rather than per-GB rates. Cloudflare's unmetered bandwidth plan starts at $20/month, eliminating egress fees entirely for cached content. Combined with a bare-metal origin server (Hetzner, OVH), you get enterprise-grade CDN performance with predictable, flat-rate pricing. Cloudflare Cache Rules can achieve 85–95% cache hit rates for typical SaaS applications.